U2731B Datasheet, PDF (19/25 Pages) ATMEL Corporation – DAB ONE- CHIP FRONT END

U2731B
Electrical Characteristics (Continued)
Test conditions (unless otherwise specified): V_S = 8.5 V, T_amb = 25°C
No. Parameters
Test Conditions
Pin
Symbol
Min. Typ. Max. Unit Type*
15.8 SCL HIGH period
t_high
4
µs
D
15.9 SCL LOW period
t_low
4.7
µs
D
15.10 Hold time START
t_hdsta
4
µs
D
15.11 Setup time START
t_susta
4.7
µs
D
15.12 Setup time STOP
t_sustp
4.7
µs
D
15.13 Hold time DATA
t_hddat
0
µs
D
15.14 Setup time DATA
t_sudat
250
ns
D
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Note: 1. The phase detector’s phase-noise contribution to the VCO’s frequency spectrum is determined by the operating frequency
of the phase detector divided by 4 according to the fractional-N technique (regularly: 16 kHz).
Figure 6. Application Circuit
51k
microcontroller
Miro crystal
16.384 MHz
CXAT-T1
8.5V _100p
33k
22k
3.3n 3.3n
4.7k
BC846B
2.2k 2.2k
33k 4.7k
1.2n
BB545
27p
8.5V
2.2p
VAGCIF
3.3 µ
Antialiasing
filter
Address
18p
68p
33p
10n
10n
100p
47nH
4.7p 2.2p 2.2p 4.7p
8.5V
100p
10n
10n 10n
10n
select voltage _{44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23}
U2731B
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
SCL
SDA
76k 76k
76k
100n
1n
1n
Switches
9k 9k
9k
100n
100n
1n
1n
10n 10n 1n 220n
3.3µ
AD-converter
4.7k
1.8k
SAW S+M
filter X6922M
680nH
WAGC
SLI
8.5V
U2730B-N
Pre-
selector
8.5V
RFA
RFB VAGCRF
19
4671C–DAB–06/04